JPH0473104A - Manufacture of building material - Google Patents

Abstract

PURPOSE:To prevent transparency from becoming too high by coating a timber with titanium oxide and then impregnating unsaturated polyester resin. CONSTITUTION:Before the WPC processing is carried out by using a slice veneer of natural wood, titanium oxide powder is dispersed in water, and the surface of a timber is coated with a mixed liquid to which aqueous resin as a binder is coated, dried and coated with titanium oxide. After that, the slice veneer is impregnated with unsaturated polyester resin, and then the unsaturated polyester resin is cured by overlapping said slice veneer on the surface of a base such as a veneer or the like and pressurizing while heating, and simultaneously the slice veneer is bonded with the base. As the surface of a building material thus WPC processed is coated preliminarily with white titanium oxide, the building material is turned into the wet color by the irregular reflection of light and shielding effect to prevent its transparency from becoming too high.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for producing WPC-treated building materials.

[Conventional technology]

Architectural materials treated with WPC by impregnating and curing wood with unsaturated polyester resin have improved wear resistance, water and moisture absorption resistance, hardness, dimensional stability, etc. compared to materials that are not treated in this way. Excellent performance. For this reason, it has been widely practiced in the past to manufacture floorboards and the like by attaching this WPC-treated construction material to the surface of a substrate such as plywood as a board.

[NH that the invention attempts to solve]

However, when impregnated with an unsaturated polyester resin and subjected to WPC treatment, the construction material tends to become wet colored and have high transparency. This tendency is particularly high in the case of soft-skinned wood species such as Japanese cypress.For example, if this construction material is used as a plywood and pasted on the surface of a substrate such as a wood board, the surface of the substrate can be seen through the construction material, which can be fatal. This was a drawback. The present invention was developed in view of the above-mentioned problems, and it is an object of the present invention to provide a method for manufacturing construction materials that can prevent the materials from becoming wet and becoming highly transparent.

[Means to solve the problem]

The method for manufacturing a construction material according to the present invention is characterized by applying titanium oxide to wood and then impregnating the wood with unsaturated polyester resin. The present invention will be explained in detail below. Wood treated with WPC in the present invention includes: Although not particularly limited, sliced veneer obtained by thinly slicing natural wood can be used. In the present invention, titanium oxide powder is applied to the surface of the wood before the WPC treatment. Titanium oxide is applied to the surface of the wood by dispersing titanium oxide powder and water and adding and mixing a water-based resin such as emulsion resin as a binder, then applying this mixture to the surface of the wood and drying it. can be processed. The amount of titanium oxide added in this mixed solution varies depending on the desired color tone, but if the total amount is 100 parts by weight, it is preferably set to 1 to 10 parts by weight of titanium oxide, and the amount of water-based resin is 5 to 20 parts by weight. The amount of addition is preferably 100%. After applying titanium oxide to the surface of the wood in this way, the wood is impregnated with an unsaturated polyester resin and cured, thereby making it possible to obtain a WPC-treated building material. Here, when using sliced veneer as wood, the sliced veneer is impregnated with unsaturated polyester resin, and then the sliced veneer is layered on the surface of a substrate such as a board, and heated and pressurized.
This allows a sliced veneer to be attached to a substrate at the same time as unsaturated polyester resin is cured. Since the surface of the WPC-treated construction material is coated with white titanium oxide in advance, the titanium oxide diffuses light and has a concealing effect, making the construction material wet-colored and transparent. This can prevent the increase in sexual activity. Therefore, when a construction material is attached to the surface of a substrate as a board, the bare surface of the substrate will not be visible through the construction material. In the above example, a sliced veneer obtained by slicing natural wood is used as the wood, but a laminated veneer can also be used as the wood. This laminated veneer is manufactured by slicing natural wood, laminating and gluing many veneers to create a laminated flitch, and slicing this laminated flitch along the plane that intersects the laminated surface of the veneer. In the laminated veneers manufactured in this way, the cut surfaces of each veneer appear as wood grains, making it possible to express the appearance of precious wood. If such a laminated veneer is manufactured using raw wood with noticeable radial structure such as agathis, then when this laminated veneer is treated with WPC, the transparency will increase and the radiant structure will become noticeable on the surface. Therefore, laminated veneers made from materials such as agathis cannot express materials with dense wood texture such as cedar or cypress.
If the surface of the laminated veneer is treated with titanium oxide before WPC treatment as in the present invention, the laminated veneer will become wet colored due to the diffused reflection of light and the concealing effect of titanium oxide, resulting in high transparency. This allows even laminated veneers made from materials with noticeable radiation structures, such as agathis, to produce the appearance of materials with dense wood grains such as cedar and cypress. In addition, when coloring the laminated veneer as described above to spring wood color, etc., a dyeing process such as immersing the laminated veneer in a dye bath is required, but when applying titanium oxide to the laminated veneer, By adding and mixing a coloring agent to the titanium liquid, it becomes possible to color a laminated coated plate without requiring a dyeing process.

[Implementation flA]

The invention will now be illustrated by examples. Example 1 80 g of a titanium oxide mixture having the following composition was applied to the surface of a sliced veneer with a thickness of 0.3 mm obtained by slicing natural Japanese cypress.
It was applied with a coating amount of '' and dried. Titanium oxide 5 parts by weight/50?6
Acrylic emulsion 10 parts by weight/water
90 parts by weight Next, f) Impregnate the sliced coated board with unsaturated polyester resin, overlay it on the surface of the board formed from the own board, and heat and pressurize it to harden the unsaturated polyester resin 3 and slice it into the board. The veneers were glued together to obtain a cypress wood board. In this thing,
The sliced veneer does not become wet and has I11, which is unique to Hinoki!
The dense wood grain was not lost, and the bare surface of the board was not reflected on the surface of the sliced veneer. Comparison Example 1 A Japanese cypress veneer board was obtained in the same manner as in Example 1, except that titanium oxide was not applied to the surface of the Nislice veneer. In this case, the sliced veneer had a wet color and was highly transparent, and the surface of the substrate could be seen on the surface of the sliced veneer. Using a laminated veneer manufactured by laminating and bonding a large number of Agatis veneers dyed with A laminated veneer was coated with titanium oxide in the same manner as in Example 1, and further impregnated with an unsaturated polyester resin and adhered to a substrate in the same manner as in Example 1 to obtain a cypress board. In this case, the sliced veneer did not turn wet and the bare surface of the substrate did not appear on the surface of the sliced veneer, closely resembling natural Japanese cypress with inconspicuous agathis radiation structure. A pick-up board was obtained in the same manner as in Example 2, except that titanium oxide was not applied to the surface of the laminated veneer. In this case, the sliced veneer had a wet color and was highly transparent, the radial structure peculiar to agathis was noticeable, and the background of the substrate was visible on the surface of the sliced veneer, resulting in low commercial value. K11M3 A laminated veneer similar to that in Example 2 was used, and a titanium oxide mixed solution having the following composition was applied to the surface of the veneer at a coating amount of 80 g/m 2 and dried.・Titanium oxide 5 parts by weight ・50% acrylic emulsion 20 parts by weight ・Coloring agent (brown pigment) 0.1 part by weight Water 8
0 parts by weight The rest was carried out in the same manner as in Example 2, and the laminated veneer was impregnated with an unsaturated polyester resin and adhered to a substrate to obtain a cypress board. In this case, the sliced veneer did not turn wet and the bare surface of the substrate did not appear on the surface of the sliced veneer, and it closely resembled natural Japanese cypress with inconspicuous agathis radiation structure.

【Effect of the invention】

As described above, in the present invention, titanium oxide is applied to the wood, and the wood is impregnated with unsaturated polyester resin, so that the titanium oxide diffuses light and has a concealing effect, making it suitable for construction materials. This prevents the material from turning wet and becoming highly transparent, and prevents the surface of the board from being visible through the construction material when it is attached to the surface of the board using construction materials. Things will disappear.

Claims (1)

[Claims] (1) A method for producing a building material, which comprises applying titanium oxide to wood and then impregnating the wood with unsaturated polyester resin.